Check-valve for pneumatic tires.



G. A. HAAS.

CHECK VALVE FOR PNEUMATIC TIRES.

APPLICATION TILED JULY 24. 1909.

v i,04 3,224 Patented Nov, 5, 1912.

mmum Ilka-4L WITNESSES.-

' INVENTOR,

Cyrus A HaasoHnoK vALvE non. rnnumarrrc Titans. Y

Specification of Letters Patent.

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To all .iwhom tt may. concern: I

Be it known that I, CYRUS A. HAAS, citi-- zen of the United States, residing at St.

' Louis, State; of Missouri, have invented certain new and useful Improvements in Check-Valves for Pneumatic Tires, of

' which the following is aflfull, clear, and

exact description, reference being had to the accompanying drawings, forming a part hereof. I

My invention has relatlon to improve- 7 ments, in check-valves for pneumatic tires;

and it consists in the novel construction of valvemore fully set forth in thespecflfication'and pointed out in the claims.

In ,the drawings, Figure 1 1s a cross-secsupporting rim, showing my check-valve both in section and elevation, applied there-- to; Fig. 2 is an enlarged middle longitudinal section of the valve; Fig.3'is a cross-section 0n the line 3-3 of Fig. 2;and Fig. -4 is a detached perspective 7 of the stop or ring which arrests the inwardnrovement of. the

spherical ball or. valve. The object of my invention isto provide the prevailing -form-ofautomobile or other pneumatic tirewith 'a' check valve attachment which will make the inflation of such tire easy, consuming a minimum amount of energy on the part of either the operator by whom, or the motor by which the pump infiatin the tire may be actuated.

A further object is to construct a valve which shall 'b e'simple', readily attachable to prevailing*tir&, one'which s'hall be cheap,

durable, light and .air tight...

In detail the. invention may be described as follows :I{eferring to the' drawings, T represents the inner inflatable tire, and T the outer section as well understood in the art. In the present illustration is shown" a wooden rim R to-whichthe rubber section T 'is secured by the locking ring L, the outside removable flange F and the inside removable flange F as shown being common 'constructions'in the art. VVith these my invention -is not immediately concerned. In

the prevailing forms of pneumatic tires, there Is present the tube or valve-stem l terminating at'its inner end in a flarlng head OI'fIIlOllth 2 in communication with the in flatableitire section, the tube being exteri-- orly screw-threaded and carrying a lock nut 3 by which the head 2 is drawn firmly (broken away) against the edges of orsection T'.- p

y The outer reduced stem or nipple. 1, in the prevailing constructions carries ja .,checkvalve which in the present-. -instance is omitted and in lieu thereof'is substituted the Patented Nov.f5,"1912. Application filed July 24, 1909. Serial No. 509,423., f t

- check-valve attachment forminguthe subjectmatter of the presentinventioni Tl1iS} OI1- sists of a valve-casing4;,screw-threaded on [the interior so as to screw-over the reduced extension 1 as shown (Eig.,;1 Thepasing 4 is provided With 'anannular metallic washer 5 resting. against; the, base .-.of ;;;the valve-stop or ring. 6 screwed into the,casing, and when the latter is fully; driven home,-the ,washer 5 wi1l press against the ,endof. the reduced stem 1 of the tube ,1; lformed with the outer end or face cf theyring 6 and disposed diametrically oppositeione anotherarelugs or projections 7, 7v, the. .thickness of;the lugs corresponding preferablynto ,the width of the face of the ring between its inner and outer circles (Figs. 3, 4). These lugsserve to arrest thespherical check-valve 8 (composed of metal preferably brass) when the latter is-unseated by an influx of air into the tube 1 for the purpose of inflating the tire T. It will be noticed (Figs. 3, 4) that; the width of the lug 7 is slightly less than (and in practice should not exceed) the diameter of the openingin the ring 6, such. a construction oflering a-minimumdegree of resistanceto the influx of air entering the tube 1, the air havinga chance to flow into .the ring'f'rom practically all directions.

A. seata for the valve is formed. at the base of the reduced exteriorly screw-thread- .ed stem or neck. 4' forming the outer terminal of the valve-casing 4, over which neck the end of the hose (not shown) leading from anyavailable air pump is passed during the inflating operation as well understood in the art.

When the inflation is complete, the com-- pressed air within the tire drives the checkvalve 8 against the conical seat a, and the neck 4"is closed by a valve-cap 9 preferably provided with a compressible packingdisk 10 att-he bottom thereof. for engaging the end of the neck (Fig. 2). During the inflating operation the infio'wing air unseats the valve 8 forcing'it against the lugs 7, 7, of the valve-stop or ring 6, the air passing through the opening of the ring between the lugs and Valve 8 as clearly obvious from the drawings Y casing 4 is preferably polygonal on the outside soit' can. be seized by hand or by a; wrench and driven home on the tube l-where it remains a permanent attachment to the ,Wheel. The sphere or ball 8 is of course, sensitive to any disturbance from without,ii ts spherical surface readily yielding to the passage of [O an-inflowing air current so'that the operation ofpumping and attendant infiatlonls 'made extrei'nely easy., At the same time the,

conical seat a forthevalve makes an air air once the tire is inflated, the air within the tire driving the valve firmly against I tS 'Having described m invention, what. I c'laim isa 1. In combination with a'valve-stem, a

I check-valve comprisinga valve-casing coucasing removed a suitable distance from the.

v pled to the outside of said stem and provided with a valve-seat, a valve normally forced to said seat-under fluid-pressure from the valve-stem, a perforated stop in the valvevalve-seat for arresting and positioning the valve during the inflation of the tire, and a washer interposed between the stop and the end of the valve-stem, and compressed be tween said stem and stop.

2. In combination with a valve-stem, a

der fluid pressure from the valve-stem,-"a.

perforated abutment located within the'casing and limiting. the distance the stem shall enter the casing whereby a tight joint is formed, said abutment being removed from .the valve-seat; and members disposed about the center of the abutment and projecting from'and beyond the plane of the 'face thereof on the'side adjacent the valve-seat for engaging the valve during inflation. tight joint and prevents escapement' 0t, any

3. In combination with a "valve-stem, a checkgva'lve comprlsmg a valve-casing cou- .pled to said stem, and provided with a valve seat, a spherical valve normally forced'to.

said vseat under fluid-pressure from the -valve-stem, a ring within the'casing engag ing the adjacent and of the valve-stein and,

removed from thevalve-seat, lugs projecting from, and beyond the plane of the face of the'ring on the side adjacent the valve seat for engaging the valve during inflation,

and means for-closing the opening leading to the valve-seat.

In testimony whereott I afli'x my signature, in presence of two witnesses. V v

CYRUS A. -HAAS. Witnesses:

EMIL STAREK, FANNm E. WEBER. 

